AMD family 17h Models 10h-2Fh may report a high number of L1 BTB MCA
errors under certain conditions. The errors are benign and can safely be
ignored. However, the high error rate may cause the MCA threshold
counter to overflow causing a high rate of thresholding interrupts.

In addition, users may see the errors reported through the AMD MCE
decoder module, even with the interrupt disabled, due to MCA polling.

Clear the "Counter Present" bit in the Instruction Fetch bank's
MCA_MISC0 register. This will prevent enabling MCA thresholding on this
bank which will prevent the high interrupt rate due to this error.

Define an AMD-specific function to filter these errors from the MCE
event pool so that they don't get reported during early boot.

Rename filter function in EDAC/mce_amd to avoid a naming conflict, while
at it.

 [ bp: Move function prototype to the internal header and
   massage/cleanup, fix typos. ]
Reported-by: NRafał Miłecki <rafal@milecki.pl>
Signed-off-by: NYazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "clemej@gmail.com" <clemej@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Morse <james.morse@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Pu Wen <puwen@hygon.cn>
Cc: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Cc: Shirish S <Shirish.S@amd.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: x86-ml <x86@kernel.org>
Cc: <stable@vger.kernel.org> # 5.0.x: c95b323d: x86/MCE/AMD: Turn off MC4_MISC thresholding on all family 0x15 models
Cc: <stable@vger.kernel.org> # 5.0.x: 30aa3d26: x86/MCE/AMD: Carve out the MC4_MISC thresholding quirk
Cc: <stable@vger.kernel.org> # 5.0.x: 9308fd40: x86/MCE: Group AMD function prototypes in <asm/mce.h>
Cc: <stable@vger.kernel.org> # 5.0.x
Link: https://lkml.kernel.org/r/20190325163410.171021-2-Yazen.Ghannam@amd.com

Sort the MCA_STATUS bits in decode output to follow how they are defined
in the register.

The order is as follows:

  Bit | Decode
  ------------
  62  | Over
  61  | UC
  59  | MiscV
  58  | AddrV
  57  | PCC
  55  | TCC
  53  | SyndV
  46  | CECC
  45  | UECC
  44  | Deferred
  43  | Poison
  40  | Scrub

 [ bp: Massage a bit. ]
Signed-off-by: NYazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: x86@kernel.org
Link: https://lkml.kernel.org/r/20190212212417.107049-2-Yazen.Ghannam@amd.com

Previous AMD systems have had a bit in MCA_STATUS to indicate that an
error was detected on a scrub operation. However, this bit was defined
differently within different banks and families/models.

Starting with Family 17h, MCA_STATUS[40] is either Reserved/Read-as-Zero
or defined as "Scrub", for all MCA banks and CPU models. Therefore, this
bit can be defined as the "Scrub" bit.

Define MCA_STATUS[40] as "Scrub" and decode it in the AMD MCE decoding
module for Family 17h and newer systems.
Signed-off-by: NYazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Morse <james.morse@arm.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Pu Wen <puwen@hygon.cn>
Cc: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190212212417.107049-1-Yazen.Ghannam@amd.com

Save a log line by printing the extended error code and the description
on a single line. This is similar to how errors are printed in other
subsystems, e.g. "#, description". If we don't have a valid description
then only the number/code is printed.
Signed-off-by: NYazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: x86@kernel.org
Link: https://lkml.kernel.org/r/20190201225534.8177-6-Yazen.Ghannam@amd.com

Update the error descriptions to match the latest documentation for
easier searching. In some cases the changes are small and in other cases
the changes may be total rewording of the description.

No functional changes.
Signed-off-by: NYazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: x86@kernel.org
Link: https://lkml.kernel.org/r/20190201225534.8177-5-Yazen.Ghannam@amd.com

Some SMCA bank types on future systems will report new error types even
though the bank type is not treated as a new version. These new error
types will reported by bits that are reserved in past systems.

Add the new error descriptions to the lists in edac_mce_amd.
Signed-off-by: NYazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Shirish S <Shirish.S@amd.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190201225534.8177-4-Yazen.Ghannam@amd.com

The existing CS, PSP, and SMU SMCA bank types will see new versions (as
indicated by their McaTypes) in future SMCA systems.

Add the new (HWID, MCATYPE) tuples for these new versions. Reuse the
same names as the older versions, since they are logically the same to
the user. SMCA systems won't mix and match IP blocks with different
McaType versions in the same system, so there isn't a need to
distinguish them. The MCA_IPID register is saved when logging an MCA
error, and that can be used to triage the error.

Also, add the new error descriptions to edac_mce_amd. Some error types
(positions in the list) are overloaded compared to the previous
McaTypes. Therefore, just create new lists of the error descriptions to
keep things simple even if some of the error descriptions are the same
between versions.
Signed-off-by: NYazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Pu Wen <puwen@hygon.cn>
Cc: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Cc: Shirish S <Shirish.S@amd.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190201225534.8177-3-Yazen.Ghannam@amd.com

Add the (HWID, MCATYPE) tuples and names for the new MP5, NBIO, and
PCIE SMCA bank types.

Also, add their respective error descriptions to the MCE decoding module
edac_mce_amd.
Signed-off-by: NYazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Pu Wen <puwen@hygon.cn>
Cc: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Cc: Shirish S <Shirish.S@amd.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190201225534.8177-2-Yazen.Ghannam@amd.com

Add support for Hygon Dhyana CPU to EDAC.
Signed-off-by: NPu Wen <puwen@hygon.cn>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: mchehab@kernel.org
Cc: tglx@linutronix.de
Cc: mingo@redhat.com
Cc: hpa@zytor.com
Cc: thomas.lendacky@amd.com
Cc: linux-edac@vger.kernel.org
Link: https://lkml.kernel.org/r/9d71061301177822bc55b3bfd44f91057458d886.1537533369.git.puwen@hygon.cn

Currently, bank 4 is reserved on Fam17h, so we chose not to initialize
bank 4 in the smca_banks array. This means that when we check if a bank
is initialized, like during boot or resume, we will see that bank 4 is
not initialized and try to initialize it.

This will cause a call trace, when resuming from suspend, due to
rdmsr_*on_cpu() calls in the init path. The rdmsr_*on_cpu() calls issue
an IPI but we're running with interrupts disabled. This triggers:

  WARNING: CPU: 0 PID: 11523 at kernel/smp.c:291 smp_call_function_single+0xdc/0xe0
  ...

Reserved banks will be read-as-zero, so their MCA_IPID register will be
zero. So, like the smca_banks array, the threshold_banks array will not
have an entry for a reserved bank since all its MCA_MISC* registers will
be zero.

Enumerate a "Reserved" bank type that matches on a HWID_MCATYPE of 0,0.

Use the "Reserved" type when checking if a bank is reserved. It's
possible that other bank numbers may be reserved on future systems.

Don't try to find the block address on reserved banks.
Signed-off-by: NYazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org> # 4.14.x
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/20180221101900.10326-7-bp@alien8.deSigned-off-by: NIngo Molnar <mingo@kernel.org>

... and use the macro for that.

No functionality change.
Signed-off-by: NBorislav Petkov <bp@suse.de>

struct mce.cpuid contains CPUID(1).EAX which contains family, model and
stepping and thus has enough information for our purposes. Thus get rid
of some external dependencies which are not really needed.

No functionality change.
Signed-off-by: NBorislav Petkov <bp@suse.de>

Singular fits better because it decodes a single error.

No functionality change.
Signed-off-by: NBorislav Petkov <bp@suse.de>

Using the homegrown amd_get_nb_id() to find a node ID on AMD was fine
while the L3 to node mapping was 1:1. And Zen topology broke this. So
let's start slowly moving away from it and use the topology interfaces
instead.
Signed-off-by: NYazen Ghannam <yazen.ghannam@amd.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: x86-ml <x86@kernel.org>
Link: http://lkml.kernel.org/r/1490041614-90057-2-git-send-email-Yazen.Ghannam@amd.com
[ Massage commit message. ]
Signed-off-by: NBorislav Petkov <bp@suse.de>

Fix typo in "poison consumption" error description.
Signed-off-by: NYazen Ghannam <yazen.ghannam@amd.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1497286703-62853-1-git-send-email-Yazen.Ghannam@amd.comSigned-off-by: NBorislav Petkov <bp@suse.de>

Currently, the IPID and Syndrome are printed on the same line as the
Address. There are cases when we can have a valid Syndrome but not a
valid Address.

For example, the MCA_SYND register can be used to hold more detailed
error info that the hardware folks can use. It's not just DRAM ECC
syndromes. There are some error types that aren't related to memory that
may have valid syndromes, like some errors related to links in the Data
Fabric, etc.

In these cases, the IPID and Syndrome are not printed at the same log
level as the rest of the stanza, so users won't see them on the console.

Console:
  [Hardware Error]: CPU:16 (17:1:0) MC22_STATUS[Over|CE|MiscV|-|-|-|-|SyndV|-]: 0xd82000000002080b
  [Hardware Error]: Power, Interrupts, etc. Extended Error Code: 2

Dmesg:
  [Hardware Error]: CPU:16 (17:1:0) MC22_STATUS[Over|CE|MiscV|-|-|-|-|SyndV|-]: 0xd82000000002080b
  , Syndrome: 0x000000010b404000, IPID: 0x0001002e00000002
  [Hardware Error]: Power, Interrupts, etc. Extended Error Code: 2

Print the IPID first and on a new line. The IPID should always be
printed on SMCA systems. The Syndrome will then be printed with the IPID
and at the same log level when valid:

  [Hardware Error]: CPU:16 (17:1:0) MC22_STATUS[Over|CE|MiscV|-|-|-|-|SyndV|-]: 0xd82000000002080b
  [Hardware Error]: IPID: 0x0001002e00000002, Syndrome: 0x000000010b404000
  [Hardware Error]: Power, Interrupts, etc. Extended Error Code: 2
Signed-off-by: NYazen Ghannam <Yazen.Ghannam@amd.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1487192182-2474-1-git-send-email-Yazen.Ghannam@amd.comSigned-off-by: NBorislav Petkov <bp@suse.de>

Users may not be familiar with the concept of deferred errors. There is
no action for users to take on this type of error, so give more context
in the error message to make this more clear.
Signed-off-by: NYazen Ghannam <Yazen.Ghannam@amd.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1485297149-13733-2-git-send-email-Yazen.Ghannam@amd.comSigned-off-by: NBorislav Petkov <bp@suse.de>

Assign all notifiers on the MCE decode chain a priority so that they get
called in the correct order.
Suggested-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Yazen Ghannam <Yazen.Ghannam@amd.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/20170123183514.13356-10-bp@alien8.deSigned-off-by: NIngo Molnar <mingo@kernel.org>

Dump the TSC value of the time when the MCE got logged.
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Yazen Ghannam <Yazen.Ghannam@amd.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/20170123183514.13356-8-bp@alien8.deSigned-off-by: NIngo Molnar <mingo@kernel.org>

It is not used outside of the driver anymore.
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Yazen Ghannam <Yazen.Ghannam@amd.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/20170123183514.13356-7-bp@alien8.deSigned-off-by: NIngo Molnar <mingo@kernel.org>

MCA_STATUS[43] has been defined as "Poison" or "Reserved" for every bank
since Fam15h except for Fam15h, bank 4 in which case it's defined as
part of the McaStatSubCache bitfield.

Filter out that case.
Reported-by: NDean Liberty <Dean.Liberty@amd.com>
Signed-off-by: NYazen Ghannam <Yazen.Ghannam@amd.com>
Cc: Aravind Gopalakrishnan <aravindksg.lkml@gmail.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: x86-ml <x86@kernel.org>
Link: http://lkml.kernel.org/r/1479478222-19896-1-git-send-email-Yazen.Ghannam@amd.com
[ Split an almost unparseable ternary conditional, add a comment. ]
Signed-off-by: NBorislav Petkov <bp@suse.de>

nb_bus_decoder() is only used for DRAM ECC errors so rename it so that
the name is more generic and descriptive.

Also, call it for DRAM ECC errors on SMCA systems.

[ Boris: rename it to real function name with a verb in it. ]
Signed-off-by: NYazen Ghannam <Yazen.Ghannam@amd.com>
Cc: Aravind Gopalakrishnan <aravindksg.lkml@gmail.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1479423463-8536-4-git-send-email-Yazen.Ghannam@amd.comSigned-off-by: NBorislav Petkov <bp@suse.de>

Add accessor functions and hide the smca_names array. Also, add a
sanity-check to bank HWID assignment in get_smca_bank_info().
Signed-off-by: NBorislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/20161104152317.5r276t35df53qk76@pd.tnicSigned-off-by: NThomas Gleixner <tglx@linutronix.de>

Make it differ more from struct smca_bank_name for better readability.
Signed-off-by: NBorislav Petkov <bp@suse.de>
Tested-by: NYazen Ghannam <yazen.ghannam@amd.com>
Link: http://lkml.kernel.org/r/20161103125556.15482-3-bp@alien8.deSigned-off-by: NThomas Gleixner <tglx@linutronix.de>

Call it simply smca_hwid and call local variables "hwid". More readable.
Signed-off-by: NBorislav Petkov <bp@suse.de>
Tested-by: NYazen Ghannam <yazen.ghannam@amd.com>
Link: http://lkml.kernel.org/r/20161103125556.15482-2-bp@alien8.deSigned-off-by: NThomas Gleixner <tglx@linutronix.de>

Bank 4 is reserved on family 0x17 and shouldn't generate any MCE
records. However, broken hardware and software is not something unheard
of so warn about bank 4 errors. They shouldn't be coming from bank 4
naturally but users can still use mce_amd_inj to simulate errors from it
for testing purposed.

Also, avoid special handling in the injector mce_amd_inj like it is
being done on the older families.

[ bp: Rewrite commit message and merge into one patch. Use boot_cpu_data. ]
Signed-off-by: NYazen Ghannam <Yazen.Ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Reviewed-by: NAravind Gopalakrishnan  <aravindksg.lkml@gmail.com>
Link: http://lkml.kernel.org/r/1473384591-5323-1-git-send-email-Yazen.Ghannam@amd.com
Link: http://lkml.kernel.org/r/1473384591-5323-2-git-send-email-Yazen.Ghannam@amd.comSigned-off-by: NThomas Gleixner <tglx@linutronix.de>

The MCA_SYND and MCA_IPID registers contain valuable information and
should be included in MCE output. The MCA_SYND register contains
syndrome and other error information, and the MCA_IPID register will
uniquely identify the MCA bank's type without having to rely on system
software.
Signed-off-by: NYazen Ghannam <Yazen.Ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1472680624-34221-2-git-send-email-Yazen.Ghannam@amd.comSigned-off-by: NThomas Gleixner <tglx@linutronix.de>

Scalable MCA defines a number of IP types. An MCA bank on an SMCA
system is defined as one of these IP types. A bank's type is uniquely
identified by the combination of the HWID and MCATYPE values read from
its MCA_IPID register.

Add the required tables in order to be able to lookup error descriptions
based on a bank's type and the error's extended error code.

[ bp: Align comments, simplify a bit. ]
Signed-off-by: NYazen Ghannam <Yazen.Ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1472741832-1690-1-git-send-email-Yazen.Ghannam@amd.comSigned-off-by: NThomas Gleixner <tglx@linutronix.de>

The error descriptions defined for Fam17h can be reused for other SMCA
systems, so their names should reflect this.

Change f17h prefix to smca for error descriptions.
Signed-off-by: NYazen Ghannam <Yazen.Ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1472673994-12235-4-git-send-email-Yazen.Ghannam@amd.comSigned-off-by: NThomas Gleixner <tglx@linutronix.de>

Add missing SMCA error descriptions to the error descriptions arrays.
Signed-off-by: NYazen Ghannam <Yazen.Ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1472673994-12235-3-git-send-email-Yazen.Ghannam@amd.comSigned-off-by: NThomas Gleixner <tglx@linutronix.de>

Print SyndV bit status and print the raw value of the MCA_SYND register.
Further decoding of the syndrome from struct mce.synd can be done in
other places where appropriate, e.g. DRAM ECC.

Boris: make the error stanza more compact by putting the error address
and syndrome on the same line:

  [Hardware Error]: Corrected error, no action required.
  [Hardware Error]: CPU:2 (17:0:0) MC4_STATUS[-|CE|-|PCC|AddrV|-|-|SyndV|CECC]: 0x96204100001e0117
  [Hardware Error]: Error Addr: 0x000000007f4c52e3, Syndrome: 0x0000000000000000
  [Hardware Error]: Invalid IP block specified.
  [Hardware Error]: cache level: L3/GEN, tx: DATA, mem-tx: RD
Signed-off-by: NYazen Ghannam <Yazen.Ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1467633035-32080-2-git-send-email-Yazen.Ghannam@amd.comSigned-off-by: NThomas Gleixner <tglx@linutronix.de>

Use X86_FEATURE_SMCA when detecting if SMCA is available instead of
directly using CPUID 0x80000007_EBX.
Signed-off-by: NYazen Ghannam <Yazen.Ghannam@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1462971509-3856-7-git-send-email-bp@alien8.deSigned-off-by: NIngo Molnar <mingo@kernel.org>

For Scalable MCA enabled processors, errors are listed per IP block. And
since it is not required for an IP to map to a particular bank, we need
to use HWID and McaType values from the MCx_IPID register to figure out
which IP a given bank represents.

We also have a new bit (TCC) in the MCx_STATUS register to indicate Task
context is corrupt.

Add logic here to decode errors from all known IP blocks for Fam17h
Model 00-0fh and to print TCC errors.

[ Minor fixups. ]
Signed-off-by: NAravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1457021458-2522-3-git-send-email-Aravind.Gopalakrishnan@amd.comSigned-off-by: NIngo Molnar <mingo@kernel.org>

This used to flush out MCEs logged during early boot and which
were in the MCA registers from a previous system run. No need
for that now, since we've moved to a genpool.
Suggested-by: NTony Luck <tony.luck@intel.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1439396985-12812-7-git-send-email-bp@alien8.deSigned-off-by: NIngo Molnar <mingo@kernel.org>

Use unified genpool to save Action Optional error events and put
Action Optional error handling in the same notification chain as
MCE error decoding.
Signed-off-by: NChen, Gong <gong.chen@linux.intel.com>
[ Fold in subsequent patch from Boris for early boot logging. ]
Signed-off-by: NTony Luck <tony.luck@intel.com>
[ Correct a lot. ]
Signed-off-by: NBorislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1439396985-12812-5-git-send-email-bp@alien8.deSigned-off-by: NIngo Molnar <mingo@kernel.org>

Currently, when decoding an MCE, we display 'CE' for a Deferred error, like
this:

[Hardware Error]: CPU:0 (15:2:0) MC4_STATUS[Over|CE|MiscV|-|AddrV|Deferred|-|UECC]: 0xdc04b00095080813

When the 'UC' bit in the MCx_STATUS register is clear, the error status
is either a Corrected error or Deferred error as determined by the
'Deferred' bit. So do not print 'CE' on a deferred error.

Refer to AMD Error Scope Hierarchy table in a newer BKDG (example:
49125_15h_Models_30h-3Fh_BKDG.pdf, section "RAS Features").
Signed-off-by: NAravind Gopalakrishnan <aravind.gopalakrishnan@amd.com>
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1436788382-6463-1-git-send-email-aravind.gopalakrishnan@amd.comSigned-off-by: NBorislav Petkov <bp@suse.de>

Write out MCx_ADDR into the more humanly readable "MCx Error Address"
and remove double colon in the output.

Cc: Aravind Gopalakrishnan <aravind.gopalakrishnan@amd.com>
Signed-off-by: NBorislav Petkov <bp@suse.de>

Extended error code meanings are tabulated for other banks. Extend that
tradition for MC6 too.
Signed-off-by: NAravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
Link: http://lkml.kernel.org/r/1415122868-10969-1-git-send-email-aravind.gopalakrishnan@amd.comSigned-off-by: NBorislav Petkov <bp@suse.de>

Add decoding logic for new Fam15h model 60h.

Tested using mce_amd_inj module and works fine.
Signed-off-by: NAravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
Link: http://lkml.kernel.org/r/1405098795-4678-1-git-send-email-Aravind.Gopalakrishnan@amd.com
[ Boris: simplify a bit. ]
Signed-off-by: NBorislav Petkov <bp@suse.de>

295d8cda ("EDAC, MCE, AMD: Drop local coreid reporting") removed the
code snippet which used that mask but forgot to drop the mask itself. Do
that now.
Signed-off-by: NBorislav Petkov <bp@suse.de>